Steam-boiler cleaner



(NoModeL) R. STEWART.

STEAM BOILER CLEANER. No. 295,070. Patented Mar. 11, 1884.

NITED STATES PATENT FFICE;

STEAM-BOILER CLEANER.-

SPE-OIFICATION forming part of Letters Patent No. 295,070, dated March 11, 1884.

Application filed September 4, 1883. No model.)

To (ZZZ whom it may concern.-

Be'it known that I, ROBERT STEWART, a citizen of the United States, residing at Pittsfield, in the county of Pike, State of Illinois, have invented a certain new and useful Steam- Boiler Cleaner, of which the following is a specification.

My invention relates to and is a device by which a steam-boiler may be cleaned of all sedi ment, and by which all scales formed by such sediment on the interior of such boiler are caused to become detached from said boiler, and to become pulverized and be thrownfout of such boiler. To accomplish these results, I cause a pipetobe placed att-hebottom of ast-eam-boiler, inside the same, in the water, and near the lowest point. This pipe is to run lengthwise with the boiler. The rear end of this pipe is closed with a cap. At frequent intervals along said pipe are inserted nipples or tubes from an inch to two inches long and screwed into said pipe. The outer ends of such nipples or tubes are beveled on the inside to an edge. Outside said boiler, upon said pipe, is attached an escape-valve of such a character as will permit said pipe to be instantly opened to its full capacity and at once closed again. When all is 'thus arranged, by opening and closing this valve quickly the rush of the Water in said boi1er,withthesteani-pressurethereof/through said nipples or tubes, and then stopping this rush, will shock or vibrate the contents of the boiler, which, with the agitation of the water under steam-pressure, will cause all scales or sediment to break off of the boiler, to be carried against the beveled nipples and broken up or pulverized, and then to be drawn off through said nipples or tubes into said pipe, and so out of said boiler. The said pipe and said nipples or tubes must be of such size with relation to each other that the area of a crosssection of said pipe will be greater than the sum of the areas of the cross-sections of all the tubes or nipples.

Figure 1 represents a side view of a boiler in place, with the pipe 0 0 running into'and along the bottom of the same. B represents the escape-valve.

Fig. 2 represents a view of the bottom of a boiler with pipe as located therein. 0 G is the pipe; B, the escape-valve. a a a a are the nipples or tubes screwed into the pipe G C.

Fig. 3 represents one of the nipples or tubes. 0 is the pipe; A, the nipple or tube screwed into the pipe. The dotted lines (2 show how the inside of the nipple or tube is beveled to an edge at d.

Figs. 4 and 5 are end views of a boiler partly broken away, showing application of invention.

I am aware that prior to my invention a has been made and used to clean a boiler, in combination with an ordinary globe-valve. I am also aware that prior to my invention valvesof different patterns have been made that may be used to open a pipe instantly to its full capacity. I do not therefore claim such pipe, broadly, or such valve; but

hat I do claim as my invention, and desire to secure by Letters Patent, is- 1. The combinatioinwith a steam-boiler, of a pipe, 0, situated near the bottom thereof, and provided with short tubes a, having sharp beveled ends (1, and a valve, B, all of the above parts combined and adapted to operate as described.

2. The combination,with a steam-boiler, ofapipe, O, situated near the bottom thereof, and provided with a series of short tubes, at, having sharp beveled ends (2, the said pipe 0 being greater in cross-section than the sum of the areas of the cross-sections of the shorttubes, substantially as set forth.

ROBERT- STEWART.

\Vitnesses R. A. STEWART, CHAS. A. BARNES.

perforated pipe-such as or similar to pipe 0- v 

